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Google has addressed yet another actively exploited zero-day in Chrome browser, marking the second such fix released by the company within a month. The browser maker on Friday shipped 89.0.4389.90 for Windows, Mac, and Linux, which is expected to be rolling out over the coming days/weeks to all users. While the update contains a total of five security fixes, the most important flaw rectified by Google concerns a  use after free  vulnerability in its Blink rendering engine. The bug is tracked as CVE-2021-21193. Details about the flaw are scarce except that it was reported to Google by an anonymous researcher on March 9. According to IBM, the vulnerability is rated 8.8 out of 10 on the CVSS scale, and could allow a remote attacker to execute arbitrary code on the target system. "By persuading a victim to visit a specially crafted Web site, a remote attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service condition on the system," the...

Cybersecurity researchers have unwrapped an "interesting email campaign" undertaken by a threat actor that has taken to distributing a new malware written in  Nim  programming language. Dubbed " NimzaLoader " by Proofpoint researchers, the development marks one of the rare instances of Nim malware discovered in the threat landscape. "Malware developers may choose to use a rare programming language to avoid detection, as reverse engineers may not be familiar with Nim's implementation, or focused on developing detection for it, and therefore tools and sandboxes may struggle to analyze samples of it," the researchers said. Proofpoint is tracking the operators of the campaign under the moniker "TA800," who, they say, started distributing NimzaLoader starting February 3, 2021. Prior to the latest raft of activity, TA800 is known to have predominantly used BazaLoader since April 2020. While APT28 has been previously linked to delivering  Zeb...

It didn't take long. Intelligence agencies and cybersecurity researchers had been warning that unpatched Exchange Servers could open the pathway for ransomware infections in the wake of swift escalation of the attacks since last week. Now it appears that threat actors have caught up.  According to the latest reports , cybercriminals are leveraging the heavily exploited ProxyLogon Exchange Server flaws to install a new strain of ransomware called "DearCry." "Microsoft observed a new family of human operated ransomware attack customers – detected as Ransom:Win32/DoejoCrypt.A," Microsoft researcher Phillip Misner  tweeted . "Human operated ransomware attacks are utilizing the Microsoft Exchange vulnerabilities to exploit customers." Microsoft's security intelligence team, in a separate tweet,  confirmed  that it has begun "blocking a new family of ransomware being used after an initial compromise of unpatched on-premises Exchange Servers....

Researchers have discovered a new side-channel that they say can be reliably exploited to leak information from web browsers that could then be leveraged to track users even when JavaScript is completely disabled. "This is a side-channel attack which doesn't require any JavaScript to run," the researchers said. "This means script blockers cannot stop it. The attacks work even if you strip out all of the fun parts of the web browsing experience. This makes it very difficult to prevent without modifying deep parts of the operating system." In avoiding JavaScript, the side-channel attacks are also architecturally agnostic, resulting in microarchitectural website fingerprinting attacks that work across hardware platforms, including Intel Core, AMD Ryzen, Samsung Exynos 2100, and Apple M1 CPUs — making it the first known side-channel attack on the iPhone maker's new ARM-based chipsets. The  findings , which come from a group of academics from the Ben-Gurion U...